Self-cleaning cloth board for axminster looms



Dec. 10; 1940. C75 BROWN 2 5.

SELF-CLEANING CLOTH BOARD FOR AXMINSTER LOOMS Filed Dec. 16, 1939lNvENToR CLYDE E. BROWN T.

ATTORNEY Patented Dec. 10, 1940 UNITED STATES PATENT OFFICESELF-CLEANING CLOTH BOARD FOR AXMINSTER LOOMS Application December 16,1939, Serial No. 309,638

9 Claims.

This invention relates to improvements in AX- minster looms and it isthe general object of the invention to provide a cloth board soconstructed as to facilitate removal of lint which accumulates betweenthe hooks of the nose or cloth board.

In Axminster looms having hooked or notched cloth boards for thereception ofreed dents there is a tendency for lint to collect in thenotches and interfere with the proper beatingup of the reed. In looms ofthe type set forth in Dacey and Robertson Patent No. 1,958,129 the clothboard has projecting therefrom a series of spaced hooks which assist inthe tuft forming operation. The reed dents move forwardly between thesehooks to a position slightly in advance of the front edge of the fabricretaining hook to beat the picks of filling over the hooks to a positionin front of them. Lint collects in the slots between the hooks andbecomes packed into masses sufliciently hard to bend the reed dentsrearwardly to prevent the proper amount of motion of the reed. In theform of motion shown in the patent mentioned it is necessary from timeto time to clean the lint from the cloth board by an operation which isnot only expensive but also keeps the loom temporarily idle.

When the reed beats up it moves the fabric forwardly slightly withrespect to the cloth board by an amount dependent among other thingsupon the thickness of the pick being beaten into the fell of the cloth.The latter therefore has a gradual forward feed along the cloth boardand it is an important object of my present invention to form the clothboard in such a way as to enable the reed to push the accumulating lintupwardly against the under side of the cloth as the latter movesforwardly. In this way the cloth cooperates with the reed and the clothboard to remove lint by a forward motion from the spaces between thehooks.

It is another object of my present invention to provide a cloth boardhaving forwardly and upwardly inclined surfaces between the hooks toform an acute angle pocket with the cloth into which the lint is pushedby the forward beat of the reed. As heretofore made the cloth board hasbeen under-cut in such a way as to present a sharp angle to the bottomof the cloth tending to scrape off any lint on the underside of thefabric. With my improved cloth board the fabric moves over surfaceswhich form obtuse angles with the cloth board and there is little if anytendency for the blunt angles to scrape the underside of the cloth.

porarily raising the fabric being woven from the top surface of thecloth board. This lifting of the fabric is due to the forward motion ofthe reed which also acts to 'push the accumulated lint up the inclinedsurfaces, and it is a further object of my present invention to providea cloth board so formed as to require a temporary lifting of the fabricto permit a space between the same and the cloth board into which thelint moving up the inclined surfaces can pass, subsequent forward motionof the cloth after the same is in its normal downward position on thecloth board dragging the lint forwardly away from the spaces between theslots.

With these and other objects in View which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of myinvention is set forth:

Fig. l is a side elevation of a portion of an Axminster loom withcertain parts in vertical section and showing the cloth board madeaccordin to the preferred form of my invention,

Fig. 2 is a plan view in the direction of arrow 2, Fig. 1,

Fig. 3 is a view similar to a portion of Fig. 1 with the reed in rearposition and the needle laying a pick of filling in the warp shed,

Fig. 4 is a view similar to Fig. 3 but taken somewhat later in the loomcycle to show the reed in its forward position,

Fig. 5 is a view similar to Fig. 4 showing a modified form of clothboard more particularly adaptable to the yarn spacers shown in thepreviously mentioned patent to Lacey and Robertson,

Fig. 6 is a side elevation of the cloth board shown in Fig. 5, and

Fig. 7 is a rear elevation of the modified form of cloth board lookingin the direct onof arrow l, Fig. 6.

Referring particularly to Figs. 1 and 2, the loom frame I0, front knifeframe H and cutter blade l2, lay l3, reed I4 and separator blades l5 mayall be of usual construction as shown for instance in the aforesaidpatent. The blades 15 align with the reeddents 14 to define guide-, waysfor the tuft yarn Y extending from a tube frame It, and brackets, one ofwhich is shown H at 20 in Fig. 1, support a cross girt 2! to which issecured a cloth or nose board 22 extending across the loom. The clothboard is provided with slots 25 which define between them a series ofteeth 25 between which the dents 21 of the reed pass when the lay movesforwardly.

The operation of the loom is substantially the same as that set forth inthe aforesaid patent, the lay moving backwardly and forwardly and thebinder warp B and B separating to form a warp shed for the reception ofa needle N which lays a double pick of filling F when the reed isrearward. The reed than moves forwardly to move the pick of filling upthe forwardly and upwardly inclined rear surfaces 35 of the teeth 26 andover a hook lug 3| to a position in front of the latter. The pick offilling is indicated hehind the hooks 3l in Fig. 3, while Fig.4 showsthe reed in forward position with the pick of filling and forward edges32 of the reed dents in front of the hooks 3|. When the reed movesforwardly it forces the new filling against the fell of the fabric andgives a slight forward motion to the cloth C in the direction of arrowa, Fig. 4. The take-up mechanism of the loom not shown also acts to movethe cloth forwardly, or to the left as viewed in Fig. 4.

My invention relates more particularly to the shape of the bottoms ofthe slots 25. As shown in the drawing the cloth board has an upwardlyand forwardly inclined surface 40 located between adjacent teeth 25 anddefining the bottom of the associated slot 25. The inclination of thissurface 40 is suchthat it forms an acute angle with the underside of thecloth C and its forward point, indicated at the left end of the slots asviewed in Fig. 1, lies substantially in advance of the fell of thecloth. Furthermore, the surface 40 forms an obtuse angle 4| with the topsurface 42 of the cloth board.

As already stated, continued operation of the loom results in anaccumulation of lint desi nated generally at L in the slots 25, andsuc-.

cessive forward beats of the lay packs this lint into the spaces betweenthe teeth 26. I find however that the mass of lint tends to moveforwardly when it becomes sufficiently large to be engaged by the reeddents on the forward beat of the latter. The accumulated lint thereforereceives repeated blows from the reed tending to move it up the inclinedsurface 40 and toward the fabric, with the result that part of the lintmoves between the cloth and the upper surface 42 of the cloth board asindicated at L in Fig. 4. It is to be understood that the forward beatof the reed which exert-s this forward thrust on the lint also causes aforward motion of the cloth and the latter drags that part of the lintdesignated at L forwardly or to the left out of the slots 25. Thesurface 40 extends rearwardly to a point as near the under surface 60 ofthe cloth board as is consistent with necessary strength of the clothboard. The vertical surface of the cloth board which lies adjacent tothe reed when the latter is in the position shown in Fig. 4 is verysmall with resultant negligible tendency on the part of the fibers tocollect between the body of the cloth board and the reed dents.

The preferred form of the invention just described may be used inconnection with any form of notched cloth board not necessarilydepending upon the use of the guide plates l5. When the latter are usedthe arrangement can be as set forth in Fig. 1, but if desired themodified --arator plates l5 and the guide slots 25.

form of cloth board as shown in Figs. 5 to 7 can be used. In this formof the invention the teeth 55 extend downwardly as at 5! to defineguides for the upper parts of the plates l5, thereby aiding in effectingalignment between the guide plates I5 and the reed dents 21 in a mannersimilar to that described in the, aforesaid patent to Dacey andRobertson. In order that the fibers may be free to fall away from thespaces between the hooks I extend a cut 52 lengthwise under the clothboard as indicated in Fig. 6, the breadth of this notch beinginsufficient to cause loss of registry between the sep- The notch orgroove 52 may extend downwardly from a point immediately under the rearpart of surface 40. The operation of the loom with my modified form ofcloth board is as otherwise described in connection with the preferredform.

As a further feature of the operation of the invention it is to beunderstood that forward motion of the reed moves the shot of filling upthe hooks 3|, .thereby temporarily lifting the fabric from the topsurface 42 of the cloth board. This lifting of the cloth is caused bythe forward beat of the reed which serves also to push the accumulatedlint up the inclined surfaces 40 and there is therefore temporarilyprovided a small space between the cloth and cloth board into which thelint can move. Subsequent dropping of the fabric pinches this. portionof the lint between the cloth and the clothboard, thereby assisting inmoving the lint forwardly away from the slots 25.

From the foregoing it will be seen that I have provided a cloth board soconstructed that it cooperates with the reed and the cloth being wovento effect removal of lint accumulations between the teeth 26. It willfurther be seen that the surface 40 forms an acute angle with the underside of the cloth which assists in draging the matted fibers forwardlywhen the reed heats up to the positionshown in Fig. 4. The blunt angle4| has little or no tendency to scrape fibers from the bottom of thefabric being woven. It will also be seen that in the modified form aportion of the depend-ing guides for the plates I5 is removed to permitthe fibers to fall of their own weight away from the cloth board.

Another feature of my invention is seen to reside in the fact that thehooks 3| temporarily lift the fabric by the forward beatof the lay toprovide a small space into which the reed can force a part of the lint,and that subsequent forward motion of the fabric after the same hasdropped to normal down position pinches this portion of the lint betweenthe-cloth and the cloth board and moves it away from the spaces betweenthe teeth.

Having thus described my invention it will be seen that changes, andmodifications may be made therein by those skilled in the artwithoutdeparting from the spirit and scope of the invention and I do notwish'to be limited to the details herein disclosed, but what I claim is:

1. In anAxminster loom having a reed with dents and a cloth boardoverwhich the fabric guiding surfaces formed on thecloth board inalignment with the reed dents and between the 75 teeth and under thefabric and forming a pronounced acute angle with said cloth supportingsurfaces, the reed dents when beating forwardly exerting a force on thelint between the teeth tending to move said lint up thesaid guidingsurfaces and into engagement with the fabric and the latter tending tomove the lint forwardly due to forward motion thereof.

2. In an Axminster loom having a cloth board over which the fabric beingwoven moves forwardly and said cloth board having a cloth supportingsurface and spaced teeth to receive the ents of a reed when the. latterbeats forwardly and between which lint tends to collect, thatimprovement consisting of upwardly and forwardly inclined lint guidingsurfaces formed on the cloth board at the bottom of the spaces betweenthe teeth and in alignment with the reed dents, the upper forward end ofthe guiding surfaces terminating adjacent to the under side of thefabric and forming a pronounced acute angle with said cloth supportingsurface, forward movement of the reed dents in the spaces between theteeth tending to move lint in said spaces forwardly and upwardly alongsaid inclined guiding surfaces into engagement with the under side ofthe fabric and the latter tending by contact with the lint and forwardmotion thereof to move the lint away from the spaces between the teeth.

3. In an Axminster loom having a cloth board over which the fabric beingwoven moves forwardly and said cloth board having a cloth supportingsurface and spaced teeth to receive the dents of a reed when the latterbeats forwardly and between which lint tends to collect, thatimprovement consisting of upwardly and forwardly inclined lint guidingsurfaces formed on the cloth board in alignment with the reed dents andat the bottom of the spaces between the teeth terminating adjacent tothe under side of the fabric and forming a pronounced acute angle withthe cloth supporting surface, the reed dents when moving forwardly inthe spaces between the teeth tending to move accumulated lint in saidspaces upwardly and forwardly along said inclined guiding surfaces andinto engagement with the under side of the fabric and the latter due toforward motion thereof and engagement with the lint tending to move thelatter away from the spaces between the teeth.

4. L1 an Axminster loom having a cloth board over which the fabric beingwoven moves forwardly, said cloth board having a cloth supportingsurface and spaced teeth between which lint tends to collect, the teethhaving hooks extending above the top surface of the cloth board and theloom having reed dents which move forwardly between the teeth topositions in front of said hooks, the reed beating a shot of fillingover said hooks and thereby temporarily raising the fabric from the topsurface of the cloth board, that improvement which consists of forwardlyand upwardly inclined lint guiding surfaces formed on the cloth board inalignment with the reed dents and defining the bottom of the spacesbetween said teeth and forming a pronounced' acute angle with said clothsupporting surface, forward movement of the reed dents tending to forceaccumulated lint between said teeth up said inclined guiding surfacesinto engagement with the under side of the fabric when the latter istemporarily raised from the cloth board and the fabric due to forwardmotion thereof and contact with the lint tending to move the latter awayfrom the spaces between said teeth.

5. In an Axminster loom having a cloth board over which the fabric beingwoven moves forwardly while normally in contact with the board, saidcloth board having a cloth supporting surface and spaced teeth betweenwhich lint tends to collect, the teeth having hooks extending above thetop surface of the cloth board and the loom having reed dents which moveforwardly between the teeth to positions in front of said hooks, thereed beating a shot of filling over said hooks and thereby temporarilyraising the fabric from the top surface of the cloth board, thatimprovement which consists of upwardly and forwardly inclined lintguiding surfaces formed on the cloth board between the teeth inalignment with the reed dents and defining the bottom of the spacesbetween said teeth and forming a pronounced acute angle with said clothsupporting surface, forward motion of the reed dents which temporarilylifts the fabric from the top surface of the cloth board exerting aforce on the accumulated lint in said spaces tending to move the lint upthe inclined guiding surfaces into the space between the temporarilyraised fabric and that part of the cloth board in front of said inclinedsurfaces, the fabric due to forward motion thereof and contact with thelint between said fabric and the cloth board moving said lint away fromthe spaces while said fabric is in nor-- mal contact with the clothboard.

6. A cloth board to support the forwardly moving fabric of an Axminsterloomwhich operates with a reed having dents, said cloth board having acloth supporting surface and spaced teeth with reed dent receiving slotsbetween said teeth, the bottoms of the slots being defined by upwardlyand forwardly extending lint guiding surfaces to be in alignment withthe reed dents when the cloth board is in the loom, the lint guidingsurfaces leading to the top surface of the cloth board and forming apronounced acute angle with the cloth supporting surface of the clothboard.

7. A cloth board to support the forwardly moving fabric of an Axminsterloom which operates with a reed having dents, said cloth board having acloth supporting surface and spaced teeth and reed dent receiving slotsbetween said teeth, the bottoms of the slots being formed by upwardlyand forwardly extending lint guiding surfaces to be in alignment withthe reed dents when the cloth board is in the loom, the lint guidingsurfaces leading to the top surface of the cloth board, said inclinedsurfaces forming pronounced acute angles with the cloth supportingsurface of the cloth board.

8. A cloth board to support the forwardly moving fabric of an Axminsterloom which operates with a reed having dents, said cloth board having acloth supporting surface and spaced teeth and reed dent receiving slotsbetween said teeth, the bottoms of the slots having lint guidingsurfaces to be in alignment with the dents when the cloth board is inthe loom, the lint guiding surfaces extending upwardly and forwardly tothe cloth supporting surface of the cloth boa-rd and forming apronounced acute angle with said cloth supporting surface, and saidteeth having hooked portions extending above the cloth supportingsurface of the cloth board.

9. A cloth board to support the forwardly moving fabric of an Axminsterloom which operates with a reed having dents, said cloth board having acloth supporting surface and spaced teeth 5 cloth board, and said teethhaving hooked portions extending above the cloth supporting surface ofthe cloth board and located behind the forward ends of the lint guidingsurfaces.

CLYDE E. BROWN.

